Shitty eBay Crank Pulleys

[lolsteve]

I saw a good example recently of the difference in quality on ebay
The silver is the cheapo unbranded ebay special 
the black is the delphi

Look at the welds, the cheapo has minimal welds around the base connecting it to the bushes whereas the delphi has welds all around. This is a very obvious difference in quality so you can imagine similar principles apply to other ebay parts, possibly in places you cant see (inside the pulley)